Real Balances, the Price Level and the Unit of Account

A bstract It is argued that Patinkin's introduction in his 1956 book of the stability analysis of the price level resulted in great measure from his reading of Wicksell's 1898 Interest and Prices. Both Patinkin and Wicksell based their treatments of the stability of the price level on what Patinkin used to call the "real balance effect." That effect, however, does not operate under Wicksell's assumption of a competitive "pure credit economy", where all transactions are carried out by bookkeeping transfers, and the unit of account is the same unit in which the accounts of banks are kept. In that case, Patinkin showed in the second (1965) edition of his book that the real balance effect–and, by that, the stability of the price level–would still be a feature of the system if profit maximizer banks held reserves, created by the central bank to settle temporary imbalances at the clearinghouse. According to Wicksell, on the other hand, a pure credit economy should consist of a central bank that attracts and remunerates deposits at the same interest rate charged for its loans, plus profit maximizer financial intermediaries that lend money for risky projects. The basic rate of interest set by the central bank decides, accordingly, the price level in such an economy. Wicksell's and Patinkin's approaches differ from the view put forward in the 1980s by the so-called "new monetary economics" that the key to price level stabilization is the separation of the function of money as the unit of account from its function as the medium of exchange in pure accounting systems of exchange.